> On 15 Sep 2016, at 13:41, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Thu, Sep 15, 2016 at 01:39:11PM +0100, Alex Bligh wrote: >> That's probably right in the case of file-based back ends that >> are running on a Linux OS. But gonbdserver for instance supports >> (e.g.) Ceph based backends, where each connection might be talking >> to a completely separate ceph node, and there may be no cache >> consistency between connections. > > Yes, if you don't have a cache coherent backend you are generally > screwed with a multiqueue protocol. I wonder if the ability to support multiqueue should be visible in the negotiation stage. That would allow the client to refuse to select multiqueue where it isn't safe. Wouter? -- Alex Bligh -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
